The issue with cleaning rolling stock wheels is having to rotate the wheel to remove the dirt. Enter the Uber Wheel Cleaner.. Ta da. an old horn be power bogie was the basis for this devise, I removed the wheels from both axels and replaced two wheels with traction tyre groves revered flanges outwards onto one axle. a suitable 'O' ring is fitted on each wheel.
the motor is connoted to flying leads to connect to a suitable controller.